13种杀虫剂对荔枝蛀蒂虫卵的杀伤效果

Control effect of 13 insecticides against the eggs of Conopomorpha sinensis Bradley

用喷雾法对荔枝蛀蒂虫卵进行13种杀虫剂的杀伤效果试验。结果表明：参试杀虫剂在稀释2 000倍时,2.5%高效氯氟氰菊酯EC、480g/L毒死蜱EC、10%联苯菊酯EC、10%醚菊酯SC、10%虫螨腈SC、60g/L乙基多杀菌素SC、35%硫丹EC、20%甲氰菊酯EC等8种农药对虫卵的杀伤率可达50%以上;在稀释1000倍时,只有10%联苯菊酯EC杀伤率可达100%、2.5%高效氯氟氰菊酯EC杀伤率有93%,1.8%阿维菌素EC-480 g/L毒死蜱EC（1∶1）、35%硫丹EC、480 g/L毒死蜱EC、10%醚菊酯SC、1.8%阿维菌素EC-20%甲氰菊酯EC（1∶1）、10%虫螨腈SC等6种农药的杀伤率为70%~80%,而20%甲氰菊酯EC与60g/L乙基多杀菌素SC 2种农药的杀伤率仅为60%左右,1.8%阿维菌素EC、5%多杀霉素SC与4.5%高效氯氰菊酯EC 3种农药的杀伤率在50%左右,240 g/L氰氟虫腙SC及20%氯虫苯甲酰胺SC 2种农药的杀伤率只有40%。可见在现有杀虫剂中,大多数品种对荔枝蛀蒂虫卵只有一定效果,能完全杀伤荔枝蛀蒂虫卵的品种不多。

The litchi Conopomorpha sinensis may be more effectively controlled by killing their eggs. In the present study,the control effect of 13 insecticides were detected by applying to the eggs of the insect. The results showed that,3d after spray with 1000 times dilution,only one product,10% bifenthrin EC,had a 100% killing rate,followed by 2.5% lambda-cyhalothrin EC with 93% killing rate. Six insecticides,1.8% abamectin EC-480g/L chlorpyrifos EC（1∶1）,35% endosulfan EC,480 g/L chlorpyrifos EC,10% etofenprox SC,1.8%abamectin EC-20% fenpropathrin EC（1∶1）,10% chlorfenapyr SC,got a killing rate between 70~80%. 20% fenpropathrin EC and 60g/L spinetoram SC killed about 60% of the eggs.Three products,1.8% abamectin EC,5% spinosad SC and 4.5% beta-cypermethrin EC killed 50% of the eggs;20% 240g/L metaflumizone SC and chlorantraniliprole SC got a very low controlled effect,with only 40% killing rate. It can be seen that Relatively few existing insecticides can be used to control the C. sinensis eggs.